Three Android apps for learning how to read EKGs: EKGdroid, EKG: Advanced, EKG Calipers. The last time iMedicalApps reviewed a range of ECG apps we decided Instant ECG by iAnesthesia was the best. Read our original review here. Description. Kardia works with the FDA-cleared KardiaMobile or KardiaBand ECG devices— the most clinically-validated mobile EKG solution on the market.